一口吃个胖子

1. • lit. to want to get fat with only one mouthful (proverb)
2. • fig. to try to achieve one's goal in the shortest time possible
3. • to be impatient for success

Character by character

• 一(yī)one
• 口(kǒu)mouth
• 吃(chī)eat
• 个(ge)(classifier used before a noun that has no specific classifier)
• 胖(pàng)fat
• 子(zi)noun suffix, as in 椅子 yǐzi "chair"